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NM1282KSLAXAL Datasheet(PDF) 51 Page - Nanya Technology Corporation.

Part # NM1282KSLAXAL
Description  MCP Specification
PDF  120 Pages
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Manufacturer  NANYA [Nanya Technology Corporation.]
Direct Link  http://www.nanya.com
Logo NANYA - Nanya Technology Corporation.

NM1282KSLAXAL Datasheet(HTML) 51 Page - Nanya Technology Corporation.

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Version 1.3
51
Nanya Technology Corp.
06/2018
All Rights Reserved. ©
2Gb SLC NAND + 2Gb LPDDR2
NM1282KSLAXAL
NTC Proprietary
Level: Property
(14)Invalid blocks (bad blocks)
The device occasionally contains unusable blocks. Therefore, the following issues must be recognized:
The number of valid blocks over the device lifetime is as follows:
Symbol
Min
Typ.
Max
Unit
Valid(Good) Block Number
2,008
－
2,048
Blocks
Bad Block Test Flow
Regarding invalid blocks, bad block mark is in whole pages.
Please read one column of any page in each block. It makes sure that every invalid block has Majority “0” data
at this column. If the data of the column is Majority “0”, define the block as a bad block.
Note1: No erase operation is allowed to detected bad blocks.
Pass
Start
Block No = 1
Read Check
Last Block
End
Block No. = Block No. + 1
Bad Block1
No
Yes
Fail
Please do not perform an erase operation to bad blocks. It may be impossible to recover
the bad block information if the information is erased.
Check if the device has any bad blocks after installation into the system.
Refer to the test flow for bad block detection. Bad blocks which are detected by the test
flow must be managed as unusable blocks by the system.
A bad block does not affect the performance of good blocks because it is isolated from
the bit lines by select gates.



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